A (S-train)

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title: "A (S-train)" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["s-train-(copenhagen)"] topic_path: "general/s-train-copenhagen" source: "https://en.wikipedia.org/wiki/A_(S-train)" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::data[format=table title="Infobox rail line"]

Field	Value
name	A
color
logo	S-train service A.svg
logo_width	50px
logo_alt	A
image	S-Train on Nørreport platform.jpg
image_width	300 px
caption	A train at Nørreport station
type	Suburban rail, urban rail
system	S-train
status	Operational
locale	Metropolitan Copenhagen
start	Solrød Strand
end	Hillerød
stations	35
open
owner	Banedanmark
operator	DSB
stock	Litra SA and SE
linelength_km	57
tracks	2
gauge
electrification	1650 V DC overhead lines
speed	120 km/h
::

A is a service on the S-train network in Copenhagen. It is one of the base services on the network, running every 20 minutes from about 5:00 to 0:30 every day, and every 10 minutes from about 6:15 to 19:00. It runs between Hundige and Hillerød, serving all stations on the inner part of the Køge radial. During daytime on weekdays, every second train continues from Hundige station to Solrød Strand station. On Friday and Saturday nights there is also a 30 minutes service throughout the night.

::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/6b/S-train_diagram.svg" caption="S-train system map"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/d7/Stog-10-december-2023-14-december-2024-kreplan-dsb-1-2048.png" caption="S-train system map"] ::

History

Since the first part of the Køge radial opened in 1972, letter A has been used for the principal service on its inner part. Before that time the most constant characteristic of service A was that it ran on the Klampenborg radial in the northern end of the system.

::data[format=table] | Name | Southern end | Years | Northern end | 1a | 1934–1940 | 1940–1950 | [[File: S-train service A.svg| S-train service A.svg]] | 1950–1952 | 1952–1972 | 1972–1976 | 1976–1979 | 1979–1983 | 1983–1989 | 1989–1999 | 1999–2007 | 2007–2009 | Dec 2009–2018 | 2018– | |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | all stops to Valby | Klampenborgbanen: all stops to Klampenborg | | | | | | | | | | | | | | | | | | | terminated at København H | | | | | | | | | | | | | | | | | | | | Frederikssundbanen: all stops to Vanløse | | | | | | | | | | | | | | | | | | | | as above, extended to Herlev in rush hours | | | | | | | | | | | | | | | | | | | | Køgebugtbanen: all stops to Vallensbæk | | | | | | | | | | | | | | | | | | | | all stops to Hundige | | | | | | | | | | | | | | | | | | | | all stops to Hundige; extended to Solrød Strand evenings and weekends | Nordbanen: all stops to Holte | | | | | | | | | | | | | | | | | | | all stops to Hundige | | | | | | | | | | | | | | | | | | | | Nordbanen: to Hillerød, non-stop Østerport-Hellerup-Lyngby-Holte | | | | | | | | | | | | | | | | | | | | as above except all stops until Hellerup | | | | | | | | | | | | | | | | | | | | Hareskovbanen: all stops to Farum | | | | | | | | | | | | | | | | | | | | all stops to Hundige; some daytime trains to Solrød Strand | | | | | | | | | | | | | | | | | | | | Nordbanen: non-stop Hellerup-Jægersborg, all stops to Hillerød | | | | | | | | | | | | | | | | | | | ::

Ax, K, A+

Until 2007, separate service designations were used for trains that reinforced the basic service on the Køge radial in high-traffic periods. This was in part because they had their own stopping patterns, and in part due to the then-current doctrine that a service letter such as A must not be used for more than exactly 3 trains an hour. The first supplementary service was the rush-hour Ax which started running when the first phase of the Køge radial opened in 1972. It was upgraded to the daytime K service in 1992 and quickly renamed to A+ in 1993.

::figure[src="https://upload.wikimedia.org/wikipedia/commons/7/75/København_Kopenhagen_DSB_S-Bahn_662822.jpg" caption="2nd generation S-train on line Ax at Dybbølsbro in 1975. Line Ax"] ::

::data[format=table]

Name	Southern end	Years	Northern end	Ax	1972–1976	1976–1979	1979–1983	1983–1992	K	1992–1993	A+	1993–1995	1995–1998	1998–2002	2002–2005	2006–2007
Køgebugtbanen:
all stops to Vallensbæk	terminated at Hellerup
all stops to Hundige
to Hundige but stopping where?	terminated at Hellerup or Østerport?
to Hundige, non-stop København H - Friheden	terminated at Østerport
to Køge, non-stop København H - Sjælør - Friheden
as above, plus stop at Sydhavn
as above, plus stop at Dybbølsbro
Hareskovbanen:
to Buddinge Mon-Fri
Joined into A from September 2007
::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/1/12/Flapskilt_Hellerup_-_Line_E+.jpg" caption="Incorrect signage in Hellerup. In 2002, it was considered to rename line <span style="background-color:#66CCFF; color:white; font-weight:bold; padding-left:4px; padding-right:2px;">A+ to E+, but only the flap signs were prepared."] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/b/b4/Avedoere_Station_Denmark_perron_udgang.jpg" caption="Avedøre Station]]."] ::

References

"Hundige / Solrød Strand". DSB.
"Night Fri & Sat". DSB.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::